CA2067615A1 - Y/c separation circuit - Google Patents

Y/c separation circuit

Info

Publication number
CA2067615A1
CA2067615A1 CA002067615A CA2067615A CA2067615A1 CA 2067615 A1 CA2067615 A1 CA 2067615A1 CA 002067615 A CA002067615 A CA 002067615A CA 2067615 A CA2067615 A CA 2067615A CA 2067615 A1 CA2067615 A1 CA 2067615A1
Authority
CA
Canada
Prior art keywords
signal
delay line
glass delay
input
control voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002067615A
Other languages
French (fr)
Other versions
CA2067615C (en
Inventor
Hidehiro Ugaki
Kazunori Nohara
Nobukazu Hosoya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP3098891A external-priority patent/JP2627367B2/en
Priority claimed from JP3141967A external-priority patent/JP2623032B2/en
Priority claimed from JP3158984A external-priority patent/JP2657131B2/en
Priority claimed from JP3192133A external-priority patent/JP2877569B2/en
Application filed by Individual filed Critical Individual
Publication of CA2067615A1 publication Critical patent/CA2067615A1/en
Application granted granted Critical
Publication of CA2067615C publication Critical patent/CA2067615C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

A Y/C separation circuit includes a glass delay line for delaying an input composite video signal. A
luminance signal and a chrominance signal are separated from each other by an adding circuit and a subtracting circuit each of which receives the input signal and an output signal from the glass delay line. The output signal from the glass delay line is phase-shifted by a 90° phase shifting circuit and then inputted to a multiplier which further receives the input signal. The multiplier outputs an error signal according to a phase difference between color burst signals included in the both signals, and a control voltage according to the error signal is outputted from a low-pass filter. The control voltage is applied to gyrators which terminate an input and an output of the glass delay line, respectively, whereby an inductance value of each of the gyrators is controlled by the control voltage such that a delay time of the glass delay line can be exactly adjusted at one horizontal period.
CA002067615A 1991-04-30 1992-04-29 Y/c separation circuit Expired - Fee Related CA2067615C (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP3-98891 1991-04-30
JP3098891A JP2627367B2 (en) 1991-04-30 1991-04-30 Y / C separation circuit
JP3141967A JP2623032B2 (en) 1991-06-13 1991-06-13 Comb type filter circuit
JP3-141967 1991-06-13
JP3-158984 1991-06-18
JP3158984A JP2657131B2 (en) 1991-06-28 1991-06-28 Y / C separation circuit
JP3192133A JP2877569B2 (en) 1991-07-31 1991-07-31 Semiconductor inductance circuit
JP3-192133 1991-07-31

Publications (2)

Publication Number Publication Date
CA2067615A1 true CA2067615A1 (en) 1992-10-31
CA2067615C CA2067615C (en) 2001-05-29

Family

ID=27468681

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002067615A Expired - Fee Related CA2067615C (en) 1991-04-30 1992-04-29 Y/c separation circuit

Country Status (4)

Country Link
US (1) US5267027A (en)
EP (1) EP0511682B1 (en)
CA (1) CA2067615C (en)
DE (1) DE69222220T2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05283972A (en) * 1992-04-03 1993-10-29 Nec Corp Filter circuit
JPH06253234A (en) * 1993-02-23 1994-09-09 Toshiba Corp Signal demodulator
TW266377B (en) * 1993-03-23 1995-12-21 Toshiba Co Ltd
KR100296897B1 (en) * 1993-03-23 2001-10-24 다카노 야스아키 Luminance / Color Signal Separation Circuit
DE69628227D1 (en) * 1995-04-07 2003-06-26 Canon Kk Integrated circuit, method for setting a variable filter and electronic device with it
EP0924938B1 (en) * 1997-12-19 2008-02-13 Matsushita Electric Industrial Co., Ltd. Comb filter and method for controlling the same
US7494990B2 (en) * 2004-02-04 2009-02-24 Nycomed Gmbh 2-(piperidin-4-yl)-4,5-dihydro-2H-pyridazin-3-one derivatives as PDE4 inhibitors
WO2005075437A1 (en) * 2004-02-04 2005-08-18 Altana Pharma Ag Pyridazinone derivatives and their use as pde4 inhibitors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900009063B1 (en) * 1985-09-09 1990-12-17 니뽕 빅터 가부시끼가이샤 Carrier chrominance signal processing circuit
JPS6267989A (en) * 1985-09-19 1987-03-27 Matsushita Electric Ind Co Ltd Comb-line filter control device
US4809060A (en) * 1987-09-10 1989-02-28 Rca Licensing Corporation Hanging dot reduction arrangement
US4930005A (en) * 1987-12-18 1990-05-29 Victor Company Of Japan, Ltd. Circuit for removing crosstalk components in a carrier chrominance signal
US5025311A (en) * 1987-12-28 1991-06-18 Matsushita Electric Industrial Co., Ltd. Video signal separating apparatus
JP2760565B2 (en) * 1989-04-25 1998-06-04 三洋電機株式会社 Time shift detection circuit

Also Published As

Publication number Publication date
EP0511682A2 (en) 1992-11-04
DE69222220T2 (en) 1998-04-09
EP0511682A3 (en) 1993-05-26
US5267027A (en) 1993-11-30
CA2067615C (en) 2001-05-29
EP0511682B1 (en) 1997-09-17
DE69222220D1 (en) 1997-10-23

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed